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Figure 2. Cable for OPTI-3, MX2810, and NIU3 The Total Access PSU powers a single bus (select either A or B). Connect the ring-type terminals to the respective terminals on the rear of the chassis using the screws provided. Use the following wiring conventions: RED -48VA or PWR BLACK RET GREEN Ground Terminal Table 2. Wiring (OPTI-3, MX2810, NIU3) Connect the DC wiring harness of the Total Access PSU to the adapter using the modular connectors and plug the AC plug into the AC power source. MX2810 and NIU3 Systems Mounting An additional cable (ADTRAN P/N 1200657L10) is required for connecting the PS/BC to MX2810 and NIU3 systems. Rackmounted Systems Use a mounting bracket and secure the Total Access PSU to the rack (19” bracket–P/N 1175050L1, 23” bracket– P/N 1175051L1). Orient the Total Access PSU with the cables facing away from the center and secure it with four #6 3/8-inch machine screws. A single bracket mounts up to 4 Total Access PSUs. Alternately, mount the Total Access PSU directly to the rack (or a backboard) using two or more of the mounting tabs. Wiring The Total Access PSU (when ordered for use with these systems) is shipped with an adapter cable (ADTRAN P/N 1200657L10) that has a molded modular connector on one end and three ring type terminals on the other (see Figure 2). The Total Access PSU powers a single bus (select either A or B). Connect the ring-type terminals to the respective terminals on the rear of the chassis using the screws provided. Use the wiring conventions in Table 2. Connect the DC wiring harness of the Total Access PSU to the adapter using the modular connectors and plug the AC plug into the AC power source. MX2800 Mounting An additional cable (ADTRAN P/N 1200657L2) is required for connecting the PS/BC to MX2800 systems. Rackmounted Systems Use a mounting bracket and secure the Total Access PSU to the rack (19” bracket–P/N 1175050L1, 23” bracket– P/N 1175051L1). Orient the Total Access PSU with the cables facing away from the center and secure it with four #6 3/8-inch machine screws. A single bracket mounts up to 4 Total Access PSUs. Alternately, mount the Total Access PSU directly to the rack (or a backboard) using two or more of the mounting tabs. Wiring The Total Access PSU (when ordered for use with this system) is shipped with an adapter cable (ADTRAN 61175043L3-5A Issue 1, January 2004 P/N 1200657L2) that has a molded modular connector on one end and four soldered wire tips on the other (see Figure 3). Figure 3. Cable for the MX2800 Connect the soldered ends of the wires to the modular connector that fits into the chosen power bus using a small slotted screwdriver. (The power buses are labeled A and B on the rear of the chassis.) Use the following wiring conventions (holding the connector as it will be inserted in the chassis): Left Right WHITE Battery Backup Alarm Wire RED Negative Terminal Wire BLACK Positive (RET) Wire GREEN Ground Terminal Wire Secure the ends of the wires and plug the connector into the chassis on the desired power bus (A or B). Connect the other end to the DC wiring harness of the PSU wiring harness and plug the AC plug into the AC power source. Battery Backup Units Mounting When using the PS/BC in conjunction with available ADTRAN Battery Backup Units (BBUs), one of the following mounting options should be used: • Wallmounting the PS/BC (refer to Wallmounting on page 2). • Mounting the PS/BC to the product chassis containing the DC power supply. • Mounting the PS/C to the BBU. Refer to your specific ADTRAN product system documentation to determine the optimal mounting solution for your system. GROUNDING INSTRUCTIONS For complete details on product grounding requirements, refer to the Network Turnup Procedure in your product System Manual. GR-1089-CORE Requirement An equipment grounding conductor that is not smaller in size than the ungrounded branch-circuit supply conductor is to be installed as part of the circuit that supplies the product or system. The ground connector on the PS/BC provides an additional ground reference (the third prong of the AC plug is also grounded) and may be connected to the “ground bus” or “ground wire” in a customer equipment room. 18 AWG or larger ground wire is recommended. 4. BATTERY BACKUP OPERATION The following information is applicable when using the PS/BC with any available ADTRAN BBU. Alarm and Battery Disconnect Relays Two relays support Power Supply operation: • Alarm relay • Battery disconnect relay Alarm Relay and Alarm Signal The Alarm relay is provided for customer use. In normal operation the contact alarm relay is open. If an AC power failure occurs and the unit defaults to the battery backup, the relay will cycle open.closed once per second (that is one second open then one second closed). The tolerance on this cycle time is 25 percent. This indicates the battery is discharging in support of the load. If battery voltage decreases to 45 V the relay stays closed to indicate the battery is becoming dep...

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